The MSI MAG Z790 TOMAHAWK WIFI is the objective winner of this comparison, securing a victory in nine out of thirteen evaluated specifications. The most impactful advantage for this board is its storage capacity, offering 150% more M.2 slots than the alternative. While the Gigabyte B660M DS3H DDR4 maintains a lead in one category, the MSI MAG Z790 TOMAHAWK WIFI provides a significantly more robust foundation for users requiring extensive high-speed storage configurations.

Choose the MSI MAG Z790 TOMAHAWK WIFI if your build requires multiple M.2 drives and advanced connectivity options. Conversely, the Gigabyte B660M DS3H DDR4 is the appropriate selection for budget-conscious builders who prioritize a lower MSRP over the expanded feature set found on the higher-end model. Selecting between these two motherboards depends entirely on whether your priority is maximizing storage expansion or minimizing the initial cost of your system components.